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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 3
BKCSDE 33(3)
March 20, 2012 

Sequence Coverage Enhancement Using Magnetic Nanoparticles in Matrix-Assisted Laser Desorption/Ionization Mass Spectrometric Protein Analysis
Eunhye Park, Jin-Su Song, Hie-Joon Kim*
Matrix-assisted laser desorption/ionization (MALDI), Sequence coverage, Magnetic nanoparticles (MNPs), Phosphoric acid
Magnetic nanoparticles (MNPs) treated with phosphoric acid were used to improve sequence coverage in protein identification by matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS). Sample solution of tryptic peptides from proteins was mixed with the MNPs, and the MNPs were separated from the supernatant using a magnet. MALDI mass spectra obtained separately from the supernatant and the MNPs were distinctly different and complementary to each other. Combination of the two spectra led to a significantly increased sequence coverage.
987 - 992
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